地下水渗流场可视化方法与应用研究

A visualization method of groundwater flow field and its application

渗流场是反映地下水位与运移时空动态特征的有效形式,水位红线是对地下水开采严格管控的重要指标。从地下水渗流的流线绘制、流速计算、流场种子点与终止点选择、流线追踪4个方面论述了孔隙地下水渗流场可视化算法,设计了一种新的种子点布局方法表征地下水渗流场,采用改进的EULER方法实现流线的可视化表达。并将地下水渗流场空间分异性和水位红线进行融合与叠加分析,基于地下水渗流场从2D的视角揭示地下水的开采强度与超采程度的空间分布特征,自动圈定地下水超限采的区域范围。可为地下水的合理开采方案与地质管理保护措施的制定提供空间辅助决策支持。

The seepage field is an effective form to reflect the spatial and temporal dynamic characte-ristics of groundwater level and migration.The water level red line is an important indicator for strict control of groundwater exploitation.From the aspects such as streamline drawing of groundwater see-page,flow rate calculation,selection of flow field seed point and termination point,and streamline tracking,a visualization algorithm of pore groundwater seepage field is discussed,and a new seed point layout method is designed to characterize the groundwater seepage field.Moreover,the improved EULER method is used to realize the visual expression of the streamline.Then,the spatial differentiation of the groundwater seepage field and the water level red line are merged and superimposed.Based on the groundwater seepage field,the spatial distribution characteristics of groundwater exploitation intensity and over-exploitation degree are revealed from the 2D perspective,the regional scope of groundwater over-limit mining is automatically delineated,which can provide space-assisted decision-making for the rational exploitation of groundwater and the formulation of geological management protection measures.